Mark
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
#pragma once
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#include "sys/types.h"
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#define sysfs_buf_puts(buf, lim, s) \
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{ \
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if (lim > 0) { \
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size_t l = MIN(strlen(s), (lim) - 1); \
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strncpy(buf, s, l); \
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buf += l; \
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*buf = 0; \
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lim -= l; \
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} \
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}
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#define sysfs_buf_printf(buf, lim, fmt, ...) \
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{ \
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int res = snprintf(buf, lim, fmt, ##__VA_ARGS__); \
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if (res >= (int) lim) { \
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lim = 0; \
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} else { \
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buf += res; \
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lim -= res; \
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} \
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}
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#define SYSFS_MODE_DEFAULT 0644
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struct vnode;
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typedef int (*cfg_read_func_t)(void *ctx, char *buf, size_t lim);
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typedef int (*cfg_write_func_t)(void *ctx, const char *value);
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// Generic getter for config values
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// ctx: a pointer to a NULL-terminated string
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int sysfs_config_getter(void *ctx, char *buf, size_t lim);
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// Generic (u)int64_t getter
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// ctx: a pointer to an (u)int64_t value
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int sysfs_config_int64_getter(void *ctx, char *buf, size_t lim);
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int sysfs_del_ent(struct vnode *dir);
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int sysfs_add_dir(struct vnode *at, const char *path, struct vnode **result);
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int sysfs_add_config_endpoint(struct vnode *at, const char *name, mode_t mode, size_t bufsz, void *ctx, cfg_read_func_t read, cfg_write_func_t write);
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void sysfs_populate(void);
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